18.8 Riddles & Brainteasers
Two pages of links to
Brainteasers.
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last modified: 2004-01-14 16:36:19
From
Thinks.com. The main page also has crosswords, word searches, and other fun things.
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If you want to make yourself sick,
this is probably the best one. It's from
Ritsumei.
There are a lot of optical illusion sites on the web. There is lots of overlap between them. Here are just a few of the better ones:
Many more are easily found using a search engine.
Some artists have used optical illusions in their work.
M.C. Escher is the most well-known.
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edited by tmpchaos 
last modified: 2005-07-31 09:31:20